Sylvania



(No Model.)

. J. ANDREWS 85 G. LINDENTHAL.

GONSTRUCTION OF LIGHT HOUSES.

Patented Oct. 21, 1890. $57.1.

ATTORNEYS WITNESSES:

UNITED STATES PATENT OFFICE- JAMES ANDRElVS AND GUSTAV LINDENTHAL, OFALLEGHENY, PENN- SYLVANIA.

CONSTRUCTION OF LIGHT-HOUSES.

SPECIFICATION forming part of Letters Application filed July 5, 1890.

To all whom it may concern.-

Be it known that we, JAMES ANDREWS and GUSTAV LINDENTHAL, both ofAllegheny, in the county of Allegheny and State of Pennsylvania, haveinvented new and useful Improvements in Light-Houses and SimilarStructures, of which the following is a specification, reference beinghad to the annexed drawings, forming a part thereof, in which Figure 1is a vertical transverse section of a light-house constructed accordingto our improvement. Fig. 2 is a horizontal section taken on line a: a;in Fig. 1, and Fig. 3 is a horizontal section taken on line y y in Fig.1.

Similar letters of reference indicate corresponding parts in all theviews.

The object of our invention is to construct a light-house or analogousstructure with a part of the foundation and superstructure formedintegrally of a single tube or shaft.

Our invention consists in the construction and arrangement of partshereinafter described and claimed.

The inner shell A of the foundation B is connected with the outer casingO by means of radial arms a and diagonal braces b, the said radial armsand braces forming series of trusses for supporting the inner shellagainst the vertical thrust of the upper portion D of the shell, whichprojects upwardly beyond the foundation B. The space between the innershell A and the outer casing C of the foundation is filled withconcrete. The outer casing 0 extends a short distance below the PatentNo. 438,976, dated October 21, 1890.

Serial No. 357,796. (No model.)

with the said inner shell by an annular bottom plate E.

The upper portion D of the shell A may serve, without any additions ormodifications except the lantern F at the top, as the lighthouse; but weprefer to build upon the foundation B, around the upper portion of theshell, a masonry wall G, which, together with the upper portion D of theshell A, will form the superstructure of the light-house. The said WallG is secured to the casing O by means of radial bolts 0, as shown inFig. 3.

It is obvious that a structure of this character is better able toresist the lateral press ure of the wind and the impact of the wavesthan a light-house constructed of masonry and secured to its foundationby means of bolts.

Having thus described our invention, what we claim as new, and desire tosecure by Let- 5 5 ters Patent, is-

In a light-house or analogous structure, the combination of a foundationand a superstructure formed of an inner shell prolonged above thefoundation, an outer casing, a filling of concrete, and aprotecting-wall of masonry laid against the prolongation of the innershell, substantially as specified.

JAMES ANDREWS. GUSTAV LINDENTHAL.

Witnesses:

WILLIAM T. Monnrrr, M. B. SANFORD.

lower edge of the inner shell and is connected 3 5

